Kathmandu, Sept. 5 -- In terms ofglobal vaccine equity,the answer to the question of whether it is ethical for rich countries to boost with a third dose ofCovid-19 vaccine, seems like a no brainer.

But ethics aside, it has been pointed out that no one is safe until everyone is safe. It is in the public health interest of rich countries to ensure that as many people around the world are vaccinated toprevent new variants and spikes.

The graph below starkly illustrates the big gap between the jab and jab-nots - showing the wide chasm between rich and poor countries in terms of the proportion of the population which has got even the first dose.

Booster vaccination is a moot point for low-income countries because at the moment the option is...